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By Maria Golovnina
KABUL (Reuters) - Afghanistan's Hamid Karzai said he wanted a better and cleaner presidential election run-off in November to bring stability at a time when Taliban violence is at its worst in eight years of war.
Karzai agreed to face his main rival, Abdullah Abdullah, in a November 7 run-off after a U.N.-led fraud inquiry annulled enough of his votes from the first round in August to trigger a rematch.
The Afghan leader has played down fraud allegations but bowed to international pressure and ordered a run-off as a way to bolster the election's credibility at a time when Washington is weighing whether to send more troops to Afghanistan.
In a statement late Thursday, Karzai said he accepted the run-off for the sake of stability.
"I accepted the second round in the interests of the nation, to strengthen stability and prospects for democracy in Afghanistan," the presidential palace quoted him as saying.
"Now that we are holding the second round in two weeks, I want it to be better than the first round."
Concerns about security and a repeat of the fraud that tainted the first round have cast a shadow as officials in Afghanistan kicked off hasty preparations for the vote.
The U.N. special envoy to Kabul said some level of fraud was inevitable and vowed to do more this time to prevent it.
"I do not expect I will be able to eliminate fraud in two weeks' time. I think that is beyond the realm of what is possible in such a short time," Kai Eide said during a NATO meeting of defence ministers in Bratislava.
"But I what I do expect, and what we will try to do, is to reduce the level of fraud."
A top Afghan election official has already warned that domestic and international forces will hardly have enough time to provide full security ahead of the vote.
U.S. AND NATO STRATEGY
Washington is watching the election closely because it forms a key element of Western efforts to stabilise Afghanistan, a rugged nation of 33 million where militants involved in September 11, 2001 attacks are believed to have once sought sanctuary.
President Barack Obama is considering a call by his Afghanistan commander General Stanley McChrystal for tens of thousands more soldiers. Obama said this week he could reach a decision before the outcome of the November 7 vote.
Also in Bratislava, NATO Secretary-General Anders Fogh Rasmussen urged member states to support McChrystal's plan for combating the worsening insurgency.
"I firmly believe that if we show people in our countries that we are making progress, that there is light at the end of the tunnel, they will support us as long as it takes," he said.
Karzai is widely expected to win the second round largely due to his strong support base among fellow Pashtuns -- Afghanistan's largest ethnic group. He remains popular with many Afghans who see him as an experienced leader.
Former foreign minister Abdullah, on the other hand, is half Tajik and half Pashtun and is sometimes seen as a unifying candidate who can cross divisive ethnic lines in Afghanistan.
Re-running the vote, however, poses a big logistical challenge, particularly as the rapid onset of winter makes many parts of the country inaccessible.
Election officials have to rely on U.N. planes, trucks and donkeys to deliver ballots to far-flung locations. Official campaigning is expected to kick off at noon Saturday.
To prevent a repeat of fraud, many district election officials would be replaced, officials said.
The U.N. mission in Kabul has said polling stations in places of low first-round turnout due to bad security and where a lot of fraud took place in August would not open, and voters would be encouraged to cast their ballots in other nearby locations.
(Additional reporting by Hamid Shalizi, David Brunnstrom and Phil Stewart in BRATISLAVA; Writing by Maria Golovnina; Editing by Ron Popeski)